ImageBitmap and OffscreenCanvas for DEM tiles

src/util/ajax.js

@@ -291,6 +291,13 @@ export const resetImageRequestQueue = () => {
 resetImageRequestQueue();
 
 export const getImage = function(requestParameters: RequestParameters, callback: Callback<HTMLImageElement | ImageBitmap>): Cancelable {
+    if (webpSupported.supported) {
+        if (!requestParameters.headers) {
+            requestParameters.headers = {};
+        }
+        requestParameters.headers.accept = 'image/webp,*/*';
+    }
+
     // limit concurrent image loads to help with raster sources performance on big screens
     if (numImageRequests >= config.MAX_PARALLEL_IMAGE_REQUESTS) {
         const queued = {

src/util/web_worker_transfer.js

@@ -133,7 +133,7 @@ export function serialize(input: mixed, transferables: ?Array<Transferable>): Se
         return input;
     }
 
-    if (input instanceof ArrayBuffer || window.ImageBitmap && input instanceof window.ImageBitmap) {
+    if (isArrayBuffer(input) || window.ImageBitmap && input instanceof window.ImageBitmap) {
         if (transferables) {
             transferables.push(((input: any): ArrayBuffer));
         }
@@ -223,8 +223,12 @@ export function deserialize(input: Serialized): mixed {
         input instanceof String ||
         input instanceof Date ||
         input instanceof RegExp ||
+<<<<<<< HEAD
         input instanceof ArrayBuffer ||
         input instanceof ImageBitmap ||
+=======
+        isArrayBuffer(input) ||
+>>>>>>> 8e8a28025dca26e258ad6a26c064d07596f11527
         ArrayBuffer.isView(input) ||
         input instanceof ImageData) {
         return input;